266 UROCOPTIS, S. G. GONGYLOSTOMA. 



oiled. Surface nearly smooth on the convexity of each whorl, 

 closely striate near the sutures, the last whorl usually with 

 some irregularly and widely spaced rib-strias, prominent 

 where they pass upon the base. Whorls convex, the last 

 shortly free, with a weak basal keel, almost obsolete in the 

 smoother shells. Aperture quite oblique, rounded, longer 

 than wide, the peristome white, expanded and thickened. 

 Axis slender, sinuous in the last two whorls, above which it 

 is encircled by a low and slender, inconspicuous spiral thread, 

 which is minutely asperate in some whorls. 



Length 16, diam. 2.5 mm. ; whorls 12^. 



Length 11.7, diam. 2.2 mm. ; whorls 11. 



Length 17, diam. 3 mm.; whorls 12 to 13 (Pfr., types). 



Central Cuba : Mt. San Juan de Letran, and other places 

 in the Trinidad cordillera (Gundlach). 



Cyl. producta Gundl. mss., PFR., Malak. BL, iv, 1857, p. 

 110, no. 22 ; Monogr., iv, p. 693 ; Conchyl. Cab., p. 18, pi. 9, 

 f. 26-30. SOWERBY, C. Icon., xx, pi. 10, f. 89. ARANGO, 

 Contrib., p. 107. 



Distinguished from other slender east Cuban forms by the 

 uniform corneous-brown color. 



150. U. LAJONCHEREI (Arango). 



Shell long-fusiform, slender, subtruncate, thin, somewhat 

 obliquely ribbed, diaphanous, whitish. Whorls remaining 

 15-17, the last free, stretched downward; suture simple. 

 Aperture oblique, circular, the peristome shortly expanded 

 throughout. Length 15-17, diam. 2.5 mm. Internal column 

 thread-twisted (Arango). 



Central Cuba : San Juan de las Lleras, near Villaclara. 



Cyl. lajoncherei ARANGO, Proc. Acad. N. S. Phila. 1884, 

 p. 212 (Nov. 4, 1884). 



Similar to C. philippiana, but longer, with more remote 

 ribs, and whitish in color, instead of being variegated with 

 brown (Arango). 



151. U. CONTENTIOSA (Arango). 



Shell slightly rimate, fusiform-turrete, brownish corneous, 



